Electrical Vibration Instruments

Author : Arthur E. Kennelly
Publisher :
ISBN 13 : 9781330496992
Total Pages : 468 pages
Book Rating : 4.4/5 (969 download)

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Download or read book Electrical Vibration Instruments written by Arthur E. Kennelly and published by . This book was released on 2015-06-29 with total page 468 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Electrical Vibration Instruments: An Elementary d104book; On the Behavior and Tests of Telephone Receivers, Oscillographs, and Vibration Galvanometers The Bell telephone receiver is a marvelous instrument. It has undergone remarkably little change in structure since the first manufacturing model was produced by the inventor. It is reported that there were over 12,500,000 telephone receivers in public service at the end of 1920 in connection with the Bell system of the United States alone, or about one to every nine individuals in the then existing population. Nevertheless, there has been singularly little available information concerning the nature and properties of the telephone receiver as a machine. In order to understand quantitatively the delivery of speech by a receiver, its behavior as a machine must first be clearly understood. It is the object of this book to present, from an electrical engineering standpoint, the characteristics of telephone receivers (and of other vibrational instruments) as reciprocating electric motors, based on researches which have been carried on in the electrical engineering laboratories at the Massachusetts Institute of Technology and at Harvard University during the past fourteen years. The central idea in the preparation of the material for this book has been the wonderful and fascinating analogy between the laws of mechanics for a simple vibrational system, and the laws of electromagnetics for a simple alternating-current or oscillating-current system. An insight into one of these two systems provides a vision of the other. If electrical engineers received their fundamental training in the dynamics of mechanical vibrating systems, their conceptions of alternating-current circuits would doubtless be speedily grafted thereon. Actually, they almost always receive their fundamental training on these matters in the study of the electromagnetics of alternating-current circuits, so that their views of vibrating mechanical systems are most readily received through electric analogies. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.